Unidirectional Control Connections; Manual Control (Contact Closure) Ports - Extron electronics IPL EXP Series User Manual

Unidirectional Control Connections

Manual Control (contact closure) ports

These four ports are dedicated contact input ports, used exclusively to control the corresponding power output
ports. When the circuit between a signal pin and a ground pin is closed, each port turns on the corresponding AC
power output port.
•
When a manual control port is tied to ground (closed), the corresponding AC power output is on. The
power output for that port remains on for as long as the manual control port is closed. Once a manual control
port is closed (manual control is on), this port state overrides any other commands (program, configuration,
SIS commands) for the power port.
• When the manual control port is open, the corresponding power port is either off, or it follows the state
determined by the configuration, program, or SIS-over-SSH command.
IPL EXP PDU4H Rear Panel
IP P L L EX X P PD D U4H
1 2 G
MAC C : 00-0 0 5-A6- - XX-XX-XX
S/N: #### # ### E######
L L A A N
3 4 G N N O O O C C C
M A N U A L
CO N T R O L
R E R E L L A Y Y Y
G
Ground
4
Output 4
3
Output 3
Figure 14. Manual Control Contact Closure Port
Manual control mode
Manual control mode is one of the three control modes for the IPL EXP PDU4H. Manual control mode, in which
these ports are used to control the on and off status of the AC power outputs, is enabled at all times. The
IPL EXP PDU4H does not need to be configured, nor connected to a network, in order to control the on or off
state of the AC output ports. Manual control takes precedence over the other two modes (SIS-over-SSH mode
and Secure Platform Device mode).
Manual Control (Contact closure)
Each port senses external switch or contact closure by
using a 1k ohm pull-up resistor in a TTL (5 VDC) circuit.
These ports are for exclusive selection and control of
the corresponding switched AC outputs.
Ground
Wire
Nut
Switch
Device 4
Device 3
Front Panel
SWITCHED AC
1
Light when the
Share the same ground
corresponding
among contact input
manual control
connections.
port is active
(tied to ground,
logic low) and the
AC output is on.
(Switches
or similar
items)
IPL EXP Power Series • Hardware Features and Installation
(22 mm)
2 3 4
Switched
AC Power
LEDs
TIP: STP 20-2P cable,
3/16"
(5 mm)
Max.
7/8"
Heat Shrink on
Outer Jacket
to Inner
Conductor
Transition
Extron
STP 20-2P Cable
shown above, is
recommended for
these connections. For
best results, insulate
the common or drain
wires using heat shrink.
19